On Tuesday, 4 February 2025 at 10:54:12 UTC, Bastiaan Veelo wrote: > C:\Program Files\LLVM\bin\clang-cl.exe /nologo /P -target Found it. The CI machine had LLVM installed, where it found `clang-cl.exe`. After uninstalling LLVM, `cl.exe` from Microsoft is used instead, which works. -- Bastiaan.